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| author | Peter Zijlstra <peterz@infradead.org> | 2019-02-21 17:38:40 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-02-28 09:55:37 +0300 |
| commit | 02e525b2aff1d665f6466e1d123ee4cb69f1d4b0 (patch) | |
| tree | b8ab5cc7bcbe93bcb04a844a4e2352bd62d4679d /include/net/psnap.h | |
| parent | 0614621d89c43ea5b28456c2baf6b0c0e00ca81e (diff) | |
| download | linux-02e525b2aff1d665f6466e1d123ee4cb69f1d4b0.tar.xz | |
locking/percpu-rwsem: Remove preempt_disable variants
Effective revert commit:
87709e28dc7c ("fs/locks: Use percpu_down_read_preempt_disable()")
This is causing major pain for PREEMPT_RT.
Sebastian did a lot of lockperf runs on 2 and 4 node machines with all
preemption modes (PREEMPT=n should be an obvious NOP for this patch
and thus serves as a good control) and no results showed significance
over 2-sigma (the PREEMPT=n results were almost empty at 1-sigma).
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/net/psnap.h')
0 files changed, 0 insertions, 0 deletions